<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>WebSocket客户端</title>
</head>
<script type="text/javascript">
    var socket;
    if(window.WebSocket){
        socket = new WebSocket("ws://localhost:8899/ws");
        socket.onmessage = function (event) {
            var ta = document.getElementById("responseText");
            ta.value = ta.value + "\n" + event.data;
        }
        socket.onopen = function (event) {
            var ta = document.getElementById("responseText");
            ta.value = ta.value+ "\n"+"连接开启";
        }
        socket.onclose = function (event) {
            var  ta = document.getElementById("responseText");
            ta.value = ta.value +"\n"+ "连接关闭";
        }
    }else{
        alert("浏览器不支持WebSocket")
    }
    
    function send(message) {
        if(!window.WebSocket){
            return;
        }
        if(socket.readyState = WebSocket.OPEN){
            socket.send(message);
        }else{
            alert("连接尚尚未开启！");
        }
    }

</script>
<body>

    <form onsubmit="return false;">
        <textarea name="message" style="width:400px;height: 200px"></textarea>
        <input type="button" value="发送数据" onclick="send(this.form.message.value)">
        <textarea id="responseText" style="width: 400px;height: 300px;"></textarea>
        <input type="button" onclick="javascript: document.getElementById('responseText').value=''" value="清空内容"/>
    </form>

</body>
</html>